3
4	3	7
			7	1			5
						3
	2
5			4	7
					6	1	4
			2

Difficulty: Very easy (0)

	5
	2	3	1		5
						8	3
					7	1
	3	7
2	1
		2		8	3	6
						5

Difficulty: Very easy (0)

	6	4
3					7
1				8			7
			5
				3
6			8				2
		2					3
					2	4

Difficulty: Easy (0)

8
1		5		4	2	7
						5
3			2
				5			3
	2
	8	3	1		5		2
							1

Difficulty: Very easy (0)